linux-kernel - Re: ATA device reset, shoud I be concerned?

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Message-Id: <200801220231.22609.bzolnier@gmail.com>
Date:	Tue, 22 Jan 2008 02:31:22 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	Tejun Heo <htejun@...il.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Georgi Chulkov <g.chulkov@...obs-university.de>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	Mark Lord <liml@....ca>
Subject: Re: ATA device reset, shoud I be concerned?

On Monday 21 January 2008, Tejun Heo wrote:

[...]

> > Old IDE says it works for PATA. For SATA I can see it might need more
> > care and you might simply not be able to get the info.
> 
> Old IDE often locks up the machine hard after timeouts.  I'm all for

Could you point me to some bugreports?

I would like to know more about hosts/conditions for which it happens.

> gathering more info but benefit vs. risk equation just doesn't look good
> here.  Why take risk for a rare device which forgets to raise IRQ on
> media error?  If such behavior is wide spread among PATA drives && we
> can verify that TF register access after timeout is safe for PATA
> controllers, sure, but currently we aren't sure about either.

Thanks,
Bart
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